[PATCH v1 1/6] ubi: allow to read from volume with offset

[Alexey Romanov]

Now user can pass an additional parameter 'offset'
to ubi_volume_read() function.

Signed-off-by: Alexey Romanov <avromanov at salutedevices.com>
---
 cmd/ubi.c           | 6 +++---
 env/ubi.c           | 6 +++---
 include/ubi_uboot.h | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/cmd/ubi.c b/cmd/ubi.c
index 0a6a80bdd1..2257f68498 100644
--- a/cmd/ubi.c
+++ b/cmd/ubi.c
@@ -420,13 +420,13 @@ int ubi_volume_write(char *volume, void *buf, size_t size)
 	return ubi_volume_begin_write(volume, buf, size, size);
 }
 
-int ubi_volume_read(char *volume, char *buf, size_t size)
+int ubi_volume_read(char *volume, char *buf, loff_t offset, size_t size)
 {
 	int err, lnum, off, len, tbuf_size;
 	void *tbuf;
 	unsigned long long tmp;
 	struct ubi_volume *vol;
-	loff_t offp = 0;
+	loff_t offp = offset;
 	size_t len_read;
 
 	vol = ubi_find_volume(volume);
@@ -787,7 +787,7 @@ static int do_ubi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 		}
 
 		if (argc == 3) {
-			return ubi_volume_read(argv[3], (char *)addr, size);
+			return ubi_volume_read(argv[3], (char *)addr, 0, size);
 		}
 	}
 
diff --git a/env/ubi.c b/env/ubi.c
index 445d34fedb..661801d5a9 100644
--- a/env/ubi.c
+++ b/env/ubi.c
@@ -135,13 +135,13 @@ static int env_ubi_load(void)
 		return -EIO;
 	}
 
-	read1_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1,
+	read1_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1, 0,
 				     CONFIG_ENV_SIZE);
 	if (read1_fail)
 		printf("\n** Unable to read env from %s:%s **\n",
 		       CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
 
-	read2_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND,
+	read2_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND, 0,
 				     (void *)tmp_env2, CONFIG_ENV_SIZE);
 	if (read2_fail)
 		printf("\n** Unable to read redundant env from %s:%s **\n",
@@ -172,7 +172,7 @@ static int env_ubi_load(void)
 		return -EIO;
 	}
 
-	if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, buf, CONFIG_ENV_SIZE)) {
+	if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, buf, 0, CONFIG_ENV_SIZE)) {
 		printf("\n** Unable to read env from %s:%s **\n",
 		       CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
 		env_set_default(NULL, 0);
diff --git a/include/ubi_uboot.h b/include/ubi_uboot.h
index 6da348eb62..bcccb76e6c 100644
--- a/include/ubi_uboot.h
+++ b/include/ubi_uboot.h
@@ -50,7 +50,7 @@ extern int ubi_init(void);
 extern void ubi_exit(void);
 extern int ubi_part(char *part_name, const char *vid_header_offset);
 extern int ubi_volume_write(char *volume, void *buf, size_t size);
-extern int ubi_volume_read(char *volume, char *buf, size_t size);
+extern int ubi_volume_read(char *volume, char *buf, loff_t offset, size_t size);
 
 extern struct ubi_device *ubi_devices[];
 int cmd_ubifs_mount(char *vol_name);
-- 
2.34.1